package com.dm.library.widgets;


import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.FontMetrics;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;

import com.dm.library.R;
import com.dm.library.utils.DensityUtil;


public class RoundProgressBar extends View {
    /**
     * 画笔对象的引用
     */
    private Paint paint;

    /**
     * 圆环的颜色
     */
    private int roundColor;

    /**
     * 圆环进度的颜色
     */
    private int roundProgressColor;

    /**
     * 中间进度百分比的字符串的颜色
     */
    private int textColor;

    /**
     * 中间进度百分比的字符串的字体
     */
    private float textSize;

    /**
     * 圆环的宽度
     */
    private float roundWidth;

    /**
     * 最大进度
     */
    private int max;

    /**
     * 当前进度
     */
    private int progress;

    /**
     * 是否显示中间的进度
     */
    private boolean textIsDisplayable;

    /**
     * 进度的风格，实心或者空心
     */
    private int style;

    public static final int STROKE = 0;

    public static final int FILL = 1;

    private String progressText;

    public RoundProgressBar(Context context) {
        this(context, null);
    }

    public RoundProgressBar(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        paint = new Paint();

        TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RoundProgressBar);

        // 获取自定义属性和默认值
        roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.RED);
        roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);
        textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);
        textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 12);
        progressText = mTypedArray.getString(R.styleable.RoundProgressBar_progressText);
        roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);
        max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);
        textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);
        style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0);

        mTypedArray.recycle();
        init();
    }

    private RectF mOval;

    /**
     * 初始化操作
     */
    private void init() {
        mOval = new RectF();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        /**
         * 画最外层的大圆环
         */
        final int centre = getWidth() / 2; // 获取圆心的x坐标
        int radius = (int) (centre - roundWidth / 2); // 圆环的半径
        paint.setColor(roundColor); // 设置圆环的颜色
        paint.setStyle(Paint.Style.STROKE); // 设置空心
        paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
        paint.setAntiAlias(true); // 消除锯齿
        canvas.drawCircle(centre, centre, radius, paint); // 画出圆环

        /**
         * 画进度百分比
         */
        paint.setStrokeWidth(0);
        paint.setColor(textColor);
        paint.setTextSize(textSize);
        paint.setTypeface(Typeface.DEFAULT); // 设置字体
        int percent = (int) (((float) progress / (float) max) * 100); // 中间的进度百分比，先转换成float在进行除法运算，不然都为0
        FontMetrics fm = paint.getFontMetrics();
        float textHeight = (float) Math.ceil(fm.descent - fm.ascent);
        if (textIsDisplayable && percent >= 0 && style == STROKE) {
            if (TextUtils.isEmpty(progressText)) {
                float textWidth = paint.measureText(percent + "%"); // 测量字体宽度，我们需要根据字体的宽度设置在圆环中间
                //不需要显示特殊的进度文字
                canvas.drawText(percent + "%",
                        centre - textWidth / 2,
                        centre + (DensityUtil.px2sp(getContext(), textHeight) / 2),
                        paint); // 画出进度百分比
            } else {
                if (percent >= 100) //percent == 0 || percent == 100
                {
                    float textWidth = paint.measureText(percent + "%"); // 测量字体宽度，我们需要根据字体的宽度设置在圆环中间
                    //不需要显示特殊的进度文字
                    canvas.drawText(percent + "%",
                            centre - textWidth / 2,
                            centre + (DensityUtil.px2sp(getContext(), textHeight) / 2),
                            paint); // 画出进度百分比
                } else {
                    float textWidth = paint.measureText(progressText); // 测量字体宽度，我们需要根据字体的宽度设置在圆环中间
                    //显示抢购……
                    canvas.drawText(progressText,
                            centre - textWidth / 2,
                            centre + (DensityUtil.px2sp(getContext(), textHeight) / 2),
                            paint); // 画出进度百分比
                }
            }

        }

        /**
         * 画圆弧 ，画圆环的进度
         */

        // 设置进度是实心还是空心
        paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
        paint.setColor(roundProgressColor); // 设置进度的颜色
        mOval.set(centre - radius, centre - radius, centre + radius, centre + radius);// 用于定义的圆弧的形状和大小的界限
        switch (style) {
            case STROKE: {
                paint.setStyle(Paint.Style.STROKE);
                canvas.drawArc(mOval, -90, 360 * progress / max, false, paint); // 根据进度画圆弧
                break;
            }
            case FILL: {
                paint.setStyle(Paint.Style.FILL_AND_STROKE);
                if (progress != 0)
                    canvas.drawArc(mOval, -90, 360 * progress / max, true, paint); // 根据进度画圆弧
                break;
            }
        }

    }

    public synchronized int getMax() {
        return max;
    }

    /**
     * 设置进度的最大值
     *
     * @param max
     */
    public synchronized void setMax(int max) {
        if (max < 0) {
            throw new IllegalArgumentException("max not less than 0");
        }
        this.max = max;
    }

    /**
     * 获取进度.需要同步
     *
     * @return
     */
    public synchronized int getProgress() {
        return progress;
    }

    /**
     * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步 刷新界面调用postInvalidate()能在非UI线程刷新
     *
     * @param progress
     */
    public synchronized void setProgress(int progress) {
        if (progress < 0) {
            progress = 0;
//			throw new IllegalArgumentException("progress not less than 0");
        }
//		if (progress > max)
//		{
//			progress = max;
//		}
//		if (progress <= max)
//		{
        this.progress = progress;
        postInvalidate();
//		}

    }

    public int getCricleColor() {
        return roundColor;
    }

    public void setCricleColor(int cricleColor) {
        this.roundColor = cricleColor;
    }

    public int getCricleProgressColor() {
        return roundProgressColor;
    }

    public void setCricleProgressColor(int cricleProgressColor) {
        this.roundProgressColor = cricleProgressColor;
    }

    public int getTextColor() {
        return textColor;
    }

    public void setTextColor(int textColor) {
        this.textColor = textColor;
    }

    public float getTextSize() {
        return textSize;
    }

    public void setTextSize(float textSize) {
        this.textSize = textSize;
    }

    public float getRoundWidth() {
        return roundWidth;
    }

    public void setRoundWidth(float roundWidth) {
        this.roundWidth = roundWidth;
    }

    /**
     * @return 返回 progressText
     */
    public String getProgressText() {
        return progressText;
    }

    /**
     * @param progressText 对progressText进行赋值
     */
    public void setProgressText(String progressText) {
        this.progressText = progressText;
    }
}
